Paper Technology International 2020 - Journal - Page 21

PAPERTECHNOLOGYINTERNATIONAL
Figure 2: In the event a jumbo roll contains a dangerous ignition source it
can, when exposed to oxygen during the unwinding process, start a fire in
the process.
When the small water droplets turn into vapor, it will expand
its volume 1,700 times, thus absorbing energy from the fire and
displacing the oxygen required for combustion, without causing
harm to operators.
This non-invasive suppression method generates a soft
cooling effect, using very small amounts of water, avoiding, or
significantly reducing damage to machinery, and preventing the
fire from intensifying and spreading to other areas. It differs from
conventional extinguishing methods because for example, sprinklers
need large flames generating a high amount of heat to react and an
extensive amount of water is needed to extinguish a fire.
Embosser and Rewinder
Embossing and winding machines generate considerable
amounts of dry dust that accumulates on machine parts and the
surrounding area. Friction heat can easily be generated by the
machine, which can ignite the accumulated dust and cause a fire.
Firefly’s protection solution for the Embosser and Rewinder
is designed in the same way as the Unwinding system, with quick
and efficient detection and suppression of flames. The system
consists of FD-UVIR flame detectors around the machine and water
mist nozzles that will cover the high-risk area.
The solutions for the Unwinder, Embosser and Rewinder will
be linked together, making it possible to activate more or all zones in
case of detection in a critical area of the machine.
Figure 3: Friction heat can easily be generated by the machine,
which can ignite the accumulated dust and cause a fire.
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